Preparation of carbon/carbon-ultra high temperature ceramics composites with ultra high temperature ceramics coating

In order to increase the oxidation resistance of carbon/carbon (C/C) composites at long-term high temperature, C/C-Ultra High Temperature Ceramics composites (UHTCs) with a dual-layer UHTCs oxidation coating was successfully designed and fabricated. The microstructure and ablation resistance were investigated and discussed. After ablation in arc-heated wind tunnel with temperature being 2200 degrees C for 1000s, the mass ablation rate and linear ablation rate were -1.9x10(-2)mg/cm(2)s and 2.9x10(-5)mm/s, respectively. The formation of thermodynamically compatible oxide scale including ZrO2 skeleton and SiO2 or Zr-Si-O glass on the surface were mainly contributed to the excellent ablation resistance of the composite.